Murshed

Linux System Administrator

F • Freelance

Jul 2021 - Present • 5 yrs 1 mo

Provide full-cycle Linux system administration services including installation, configuration, troubleshooting, upgrades, and patch management across multiple distributions (Debian, Ubuntu, CentOS, Red Hat, etc.). Design, implement, and maintain core services such as web hosting environments (Apache, Nginx), DNS, mail servers, Cpanel, proxy servers, VPN technologies, and monitoring tools. Manage server storage solutions (LVM, RAID, NFS, iSCSI, SAN/NAS), backup and disaster recovery strategies, and ensure data security and availability. Deploy and administer virtualization platforms (Proxmox, VMware, KVM) and containerized environments. Implement and maintain network security, firewalls (iptables, nftables), intrusion detection/prevention systems, and SSL/TLS certificates. Perform system hardening, patch management, and performance tuning for high-availability and mission-critical environments. Provide technical support and consultancy to global clients via Upwork, Fiverr, and direct contracts, delivering tailored solutions for web hosting, server migrations, cloud deployments, and IT infrastructure optimization. Manage multiple client projects simultaneously, ensuring SLA compliance, timely delivery, and documentation of system changes and solutions. Automate routine administrative tasks using Bash, Python, and Ansible for configuration management and orchestration. Collaborate with clients to plan, architect, and optimize IT infrastructures aligned with business goals.